Improvement in attaching knobs to their spindles



.PATENTB'D mac. 15, 1868.

W. A. PENN.

ATTAGHING KNOBS TO THEIR SPINDLES.

No. 84,868. I

MIRIIS nuns co, mom-mo. msmuuwu o c which will enable those skilled inthe art to UNITED STATES PATENT OFFICE.

WILLIAM A. FENN, OF WOLCOTT, NEW YORK.

IMPROVEMENT IN ATTACHING KNOBS TO THEIR SPINDLES.

To all who-m 2' t may concern:

Be it known that I, WM. A. FENN, 0f- Wolcott, in the county of Wayne andState of New York, have invented a new and Improved Method of AttachingDoor-Knobs to Spindles; and I do hereby declare that the following is afull, clear, and exact description thereof,

make and use the same,reference being had to the accompanying drawings,forming part of this specification, in which--- Figure 1 is aperspective view, and Fig. 2 is a sectional view.

Similar letters of reference indicate like parts in all the figures.

This invention consists in roughening the cont-act'surfaces ot' aspindle and its adjusta hle knob'and providing the wrist of the knobwith an inclined-plane bearing-surface for the end of the screw, wherebytheknob is fixed to the spindle with additional security, as hereinaftcr more fully explained.

In the accompanying drawings, A is the spindle, B the adjustable knob,and G is the set-screw. One side of the spindle is serrated orroughened, as shown at a, and the wrist of the knob, where it comes incontact with the roughened surface of the spindle,is also roughl ened.and these surfaces are made to engage by the screw 0, which binds saidroughened faces together. The wrist. is also formed with an inclinedsurface, (I, Fig. 2, for the end of the screw to bear against, whichgives the knob entire security at any desired pointon the spindle. InFigs. 1. and .2 the screw passes through the spindle and uses it for thefulcrum, the" Wrist of the knob .having a slot, b, so as notto interferewith the head of the screw. By this method of adjustment the knob isfastened to fit the thickness of the door with accuracy, and alongitudinal play of the spindle is avoided.

Having, thusdeseribed my invention, what I claim as new, and desire tosecure by Letters Patent, is I The jamming set-screw c, in connectionwith the serrated contact surface or surfaces rawhen the knob-socket isformed with a slot, b, and inclined surface (I, substantially as hereinshown and described, for the purpose set forth. The above specification.of my invention signed by me this 22d day of April,-1SGS.

WM. A. EENN.

